It was designed by William Leonard Kingsbury, a local official; its builders are not known because the town's records were destroyed in a fire.

The present bridge's vault is carefully constructed from dry-laid granite voussoirs that were shaped for a very precise fit, with larger stones at the lower ends of the arch, and a smaller ones at the crown.

[2] In contrast to the fine stonework of the arch, the abutments and retaining walls are constructed of split-faced granite in irregular courses, wedged in place by stone chips.

The northeast abutment continues along the river as a wing wall up to a massive stone pier, the former site of a mill dam.

The original granite coping which lined the roadway shoulders has been replaced by concrete with steel guard cables, c.